用how long 问是用for回答还是别的什么
问题描述：
用how long 问是用for回答还是别的什么
答
for
答
举个例子给你 how long have you been here?
for/about one year 都可以
答
How long是提问一段时间的.通常for加一段时间,但是how long 的回答可以很灵活.
比如：How long have you been in Shanghai?
—— For three months.(你在上海多久了?-已经三个月了）
答
用for或 since短语回答，如
How long have you stayed here?
For a year./ Since a year ago.